[NI] Support AllCandidates mode for features in IDE

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tower/KotlinToResolvedCallTransformer.kt

@@ -98,6 +98,7 @@ class KotlinToResolvedCallTransformer(
 
                 return ktPrimitiveCompleter.completeResolvedCall(candidate) as ResolvedCall<D>
             }
+            CallResolutionResult.Type.ALL_CANDIDATES -> error("Cannot transform result for ALL_CANDIDATES mode")
         }
     }
 

compiler/frontend/src/org/jetbrains/kotlin/resolve/calls/tower/PSICallResolver.kt

@@ -41,9 +41,9 @@ import org.jetbrains.kotlin.resolve.calls.callUtil.getCalleeExpressionIfAny
 import org.jetbrains.kotlin.resolve.calls.callUtil.isSafeCall
 import org.jetbrains.kotlin.resolve.calls.context.BasicCallResolutionContext
 import org.jetbrains.kotlin.resolve.calls.context.ContextDependency
+import org.jetbrains.kotlin.resolve.calls.inference.buildResultingSubstitutor
 import org.jetbrains.kotlin.resolve.calls.model.*
 import org.jetbrains.kotlin.resolve.calls.results.*
-import org.jetbrains.kotlin.resolve.calls.results.ManyCandidates
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowInfo
 import org.jetbrains.kotlin.resolve.calls.smartcasts.DataFlowValueFactory
 import org.jetbrains.kotlin.resolve.calls.tasks.DynamicCallableDescriptors
@@ -93,7 +93,8 @@ class PSICallResolver(
         val factoryProviderForInvoke = FactoryProviderForInvoke(context, scopeTower, kotlinCall)
 
         val expectedType = calculateExpectedType(context)
-        var result = kotlinCallResolver.resolveCall(scopeTower, resolutionCallbacks, kotlinCall, expectedType, factoryProviderForInvoke)
+        var result = kotlinCallResolver.resolveCall(
+                scopeTower, resolutionCallbacks, kotlinCall, expectedType, factoryProviderForInvoke, context.collectAllCandidates)
 
         val shouldUseOperatorRem = languageVersionSettings.supportsFeature(LanguageFeature.OperatorRem)
         if (isBinaryRemOperator && shouldUseOperatorRem && (result.isEmpty() || result.areAllInapplicable())) {
@@ -125,7 +126,8 @@ class PSICallResolver(
                            it.knownTypeParametersResultingSubstitutor)
         }
 
-        val result = kotlinCallResolver.resolveGivenCandidates(scopeTower, resolutionCallbacks, kotlinCall, calculateExpectedType(context), givenCandidates)
+        val result = kotlinCallResolver.resolveGivenCandidates(
+                scopeTower, resolutionCallbacks, kotlinCall, calculateExpectedType(context), givenCandidates, context.collectAllCandidates)
         return convertToOverloadResolutionResults(context, result, tracingStrategy)
 
     }
@@ -142,7 +144,8 @@ class PSICallResolver(
         val deprecatedName = OperatorConventions.REM_TO_MOD_OPERATION_NAMES[remOperatorName]!!
         val callWithDeprecatedName = toKotlinCall(context, resolutionKind.kotlinCallKind, context.call, deprecatedName, tracingStrategy)
         val refinedProviderForInvokeFactory = FactoryProviderForInvoke(context, scopeTower, callWithDeprecatedName)
-        return kotlinCallResolver.resolveCall(scopeTower, resolutionCallbacks, callWithDeprecatedName, expectedType, refinedProviderForInvokeFactory)
+        return kotlinCallResolver.resolveCall(scopeTower, resolutionCallbacks, callWithDeprecatedName, expectedType,
+                                              refinedProviderForInvokeFactory, context.collectAllCandidates)
     }
 
     private fun refineNameForRemOperator(isBinaryRemOperator: Boolean, name: Name): Name {
@@ -173,6 +176,15 @@ class PSICallResolver(
             result: CallResolutionResult,
             tracingStrategy: TracingStrategy
     ): OverloadResolutionResults<D> {
+        if (result.type == CallResolutionResult.Type.ALL_CANDIDATES) {
+            val resolvedCalls = result.allCandidates?.map {
+                val resultingSubstitutor = it.getSystem().asReadOnlyStorage().buildResultingSubstitutor()
+                kotlinToResolvedCallTransformer.transformToResolvedCall<D>(it.resolvedCall, false, resultingSubstitutor)
+            }
+
+            return AllCandidates(resolvedCalls ?: emptyList())
+        }
+
         val trace = context.trace
 
         result.diagnostics.firstIsInstanceOrNull<NoneCandidatesCallDiagnostic>()?.let {
@@ -559,8 +571,10 @@ class PSICallResolver(
                                                            ktExpression, argumentName, lhsNewResult, name)
         }
 
-        // valueArgument.getArgumentExpression()!! instead of ktExpression is hack -- type info should be stored also for parenthesized expression
-        val typeInfo = expressionTypingServices.getTypeInfo(valueArgument.getArgumentExpression()!!, context)
+        val argumentExpression = valueArgument.getArgumentExpression() ?: return parseErrorArgument
+
+        // argumentExpression instead of ktExpression is hack -- type info should be stored also for parenthesized expression
+        val typeInfo = expressionTypingServices.getTypeInfo(argumentExpression, context)
         return createSimplePSICallArgument(context, valueArgument, typeInfo) ?: parseErrorArgument
     }
 

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/KotlinCallResolver.kt

@@ -38,7 +38,8 @@ class KotlinCallResolver(
             resolutionCallbacks: KotlinResolutionCallbacks,
             kotlinCall: KotlinCall,
             expectedType: UnwrappedType?,
-            factoryProviderForInvoke: CandidateFactoryProviderForInvoke<KotlinResolutionCandidate>
+            factoryProviderForInvoke: CandidateFactoryProviderForInvoke<KotlinResolutionCandidate>,
+            collectAllCandidates: Boolean
     ): CallResolutionResult {
         kotlinCall.checkCallInvariants()
 
@@ -53,6 +54,11 @@ class KotlinCallResolver(
             KotlinCallKind.UNSUPPORTED -> throw UnsupportedOperationException()
         }
 
+        if (collectAllCandidates) {
+            val allCandidates = towerResolver.collectAllCandidates(scopeTower, processor)
+            return kotlinCallCompleter.createAllCandidatesResult(allCandidates, expectedType, resolutionCallbacks)
+        }
+
         val candidates = towerResolver.runResolve(scopeTower, processor, useOrder = kotlinCall.callKind != KotlinCallKind.UNSUPPORTED)
 
         return choseMostSpecific(candidateFactory, resolutionCallbacks, expectedType, candidates)
@@ -63,12 +69,21 @@ class KotlinCallResolver(
             resolutionCallbacks: KotlinResolutionCallbacks,
             kotlinCall: KotlinCall,
             expectedType: UnwrappedType?,
-            givenCandidates: Collection<GivenCandidate>
+            givenCandidates: Collection<GivenCandidate>,
+            collectAllCandidates: Boolean
     ): CallResolutionResult {
         kotlinCall.checkCallInvariants()
         val candidateFactory = SimpleCandidateFactory(callComponents, scopeTower, kotlinCall)
 
         val resolutionCandidates = givenCandidates.map { candidateFactory.createCandidate(it).forceResolution() }
+
+        if (collectAllCandidates) {
+            val allCandidates = towerResolver.runWithEmptyTowerData(KnownResultProcessor(resolutionCandidates),
+                                                                    TowerResolver.AllCandidatesCollector(),
+                                                                    useOrder = false)
+            return kotlinCallCompleter.createAllCandidatesResult(allCandidates, expectedType, resolutionCallbacks)
+
+        }
         val candidates = towerResolver.runWithEmptyTowerData(KnownResultProcessor(resolutionCandidates),
                                                              TowerResolver.SuccessfulResultCollector(),
                                                              useOrder = true)

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/components/KotlinCallCompleter.kt

@@ -68,7 +68,25 @@ class KotlinCallCompleter(
         else {
             CallResolutionResult(CallResolutionResult.Type.PARTIAL, candidate.resolvedCall, diagnosticHolder.getDiagnostics(), constraintSystem.asReadOnlyStorage())
         }
+    }
 
+    fun createAllCandidatesResult(
+            candidates: Collection<KotlinResolutionCandidate>,
+            expectedType: UnwrappedType?,
+            resolutionCallbacks: KotlinResolutionCallbacks
+    ): CallResolutionResult {
+        val diagnosticsHolder = KotlinDiagnosticsHolder.SimpleHolder()
+        for (candidate in candidates) {
+            candidate.prepareForCompletion(expectedType)
+            runCompletion(
+                    candidate.resolvedCall,
+                    ConstraintSystemCompletionMode.FULL,
+                    diagnosticsHolder,
+                    candidate.getSystem(),
+                    resolutionCallbacks,
+                    skipPostponedArguments = true)
+        }
+        return CallResolutionResult(CallResolutionResult.Type.ALL_CANDIDATES, null, emptyList(), ConstraintStorage.Empty, candidates)
     }
 
     private  fun runCompletion(
@@ -76,11 +94,14 @@ class KotlinCallCompleter(
             completionMode: ConstraintSystemCompletionMode,
             diagnosticsHolder: KotlinDiagnosticsHolder,
             constraintSystem: NewConstraintSystem,
-            resolutionCallbacks: KotlinResolutionCallbacks
+            resolutionCallbacks: KotlinResolutionCallbacks,
+            skipPostponedArguments: Boolean = false
     ) {
         val returnType = resolvedCallAtom.freshReturnType ?: constraintSystem.builtIns.unitType
         kotlinConstraintSystemCompleter.runCompletion(constraintSystem.asConstraintSystemCompleterContext(), completionMode, resolvedCallAtom, returnType) {
-            postponedArgumentsAnalyzer.analyze(constraintSystem.asPostponedArgumentsAnalyzerContext(), resolutionCallbacks, it)
+            if (!skipPostponedArguments) {
+                postponedArgumentsAnalyzer.analyze(constraintSystem.asPostponedArgumentsAnalyzerContext(), resolutionCallbacks, it)
+            }
         }
 
         constraintSystem.diagnostics.forEach(diagnosticsHolder::addDiagnostic)

compiler/resolution/src/org/jetbrains/kotlin/resolve/calls/model/ResolutionAtoms.kt

@@ -150,14 +150,16 @@ class CallResolutionResult(
         val type: Type,
         val resultCallAtom: ResolvedCallAtom?,
         diagnostics: List<KotlinCallDiagnostic>,
-        val constraintSystem: ConstraintStorage
+        val constraintSystem: ConstraintStorage,
+        val allCandidates: Collection<KotlinResolutionCandidate>? = null
 ) : ResolvedAtom() {
     override val atom: ResolutionAtom? get() = null
 
     enum class Type {
         COMPLETED, // resultSubstitutor possible create use constraintSystem
         PARTIAL,
-        ERROR // if resultCallAtom == null it means that there is errors NoneCandidates or ManyCandidates
+        ERROR, // if resultCallAtom == null it means that there is errors NoneCandidates or ManyCandidates
+        ALL_CANDIDATES // allCandidates != null
     }
 
     init {